Charles c



(No Model.)

0. 0. SMITH. ICE FREEZING MACHINE.

No. 450,199. Patented Apr. 14,1891.

"UNITED STATES PATENT OFFICE.

CHARLES 0. SMITH, OF BROOKLYN, ASSIGNOR TO HARVEY M. LEWVIS, OF

NEV YORK, N. Y.

ICE-FREEZING MACHINE.

SPECIFICATION forming part of Letters Patent No. 450,199, dated April14, 1891.-

Application filed July 5, 1890. Serial No. 357,903. (No model.)

To all whom it may concern:

Be it known that I, CHARLES 0. SMITH, a citizen of the United States,and a resident of the city of Brooklyn, in the county of Kings and Stateof New York, have invented a certain new and useful Improvement in Ice-Freezing Machines, of which the following is a specification.

The object of this invention is to freeze water and cool articles offood and drink.

The invention consists in the construction of the case for the liquidsand of the agitator.

Figure 1 is a front view of the freezing-machine. Fig. 2 is a verticalsectional view of Fig. 1. Fig. 3 is a top view of Fig. 1. Fig. 4 is aside view of the agitator. Fig. 5 is a top View of the agitator-blade,and Fig. 6 is a modification of the agitator.

I11 machines for freezing ice by the use of a freezing compound orliquid one of the first requisites is to provide some means by which theliquid may be constantly agitated and caused to circulate rapidly, sothat all of it may come in contact with the vessel containing thearticle to be frozen, in order that the heat of the article may beabsorbed by the freezing-liquid. This agitation of the liquid isrendered necessary by its poor conductivity, except by convection oractual contact. Another requisite is that the freezing liquid orcompound be cut off or insulated as much as possible from thesurrounding atmosphere, in order that it cannot absorb any heat fromthat source. I accomplish these results by using a reciprocatingagitator, which is in-- closed entirely within the outer casing, and hasan inclined slotted blade, which alternately forces the liquid againstthe vessel containing the article to be frozen and then drawing it awayfrom it. The blade is slotted to break up any continuous currents thatmight be formed, and thus causes the liquid to be the more thoroughlycommingled and carried to and from the said vessel. To prevent the shaftfor moving the agitator from conveying heat from the exterior to theinterior, I make the walls of the outer casing double, with a dead-airspace between them, and pass the shaft through these walls and theair-space. This air-space maybe further utilized by dividing it intocompartments for cooling fruits, food, and other solid substances.

A in the several figures represents the case containing the variousreceptacles, which may be made of any suitable material and is providedwith an opening at its top. I prefer to provide the top of the casingwith an inwardly-projecting rim or ledge a, extending into the hole oropening.

A is a cover for the case.

B B, Fig. 1, are doors for closing the cooling-chambers B, Fig. 2, whichare provided with shelves for holding articles.

C, Fig. 2, is a receptacle for the water to be frozen, and is providedwith tapering Walls, which permit the ice to be readily removed in asolid cake. The vessel is of such a size that when placed in the casingit is supported upon the ledge a and closes the opening in the top. Thecover A is then put over the top of the vessel and upon the top of theeasing and makes substantially an air-tight closure into the casing atthe only pointwhere the air could enter it.

D is a shaft journaled in the sides of the casing, having ahandle Dsecured to its outer end, and provided with a crank D at its inner end.

D is a lever or agitator pivoted at D and having the blade D Figs. 2, 4,and 5, with holes D. By suspending the lever from its upper end andbelow the ledge a it is entirely within the casing, and is also out ofthe Way of the insertion and removal of the vessel C. It also permits ofthe vessel being made continuous, so that its contents may be frozen ina solid mass, whereby it will keep longer and is more easily removedfrom it when wanted, and by placing the vessel in the midst of thefreezing-liquid its heat is taken up more quickly than where thisposition is reversed, as the heat is absorbed from it in all directions.

D", Figs. 2 and 4, is a slot in which the end D of the crank works,causing the agitator D to be vibrated back. and forth through thefreezing compound when the crank D is turned.

By journaling the shaft 1) in the sides of the casing, as abovedesoribed,itis supported at two points by providing each wall or sidewith any ordinary bearings. It also permits of the agitator being placedentirely within the casing, and by operating it by means of a shaft thatpasses through two walls and through a chamber between them there is theleast possibility of the warm air being admitted to the interior of thecasing to counteract the effects of the freezing-mixture, and bypivoting the agitator-lever near the top of the inner wall it is not soapt to be affected by the brine or other liquid generally used incooling. It also secures it to one side of the receptacle for thecooling compound, so that it is out of the way of the receptacle inwhich the article is placed that is to be frozen. This permits of theready removal or insertion of the receptacle 0 without having to removeor adjust the agitator in any manner.

The blade D projects laterally under the bottom of the receptacle 0 fromthe lower end of the lever D and is set on an angle, in order that thecompound may be lifted against the walls of the water-receptacles C withgreat force when the blade is moved in one directiomwhile the holes Dbreak any steady current which may be caused by rapidly working themachine.

By placing the lever at one side of the casing or between the inner walland the receptacle C it takes up the least possible room where room isneeded for as large a receptacle as possible, and yet it enables a verylarge and peculiarly arranged and constructed blade to be operatedbeneath the recepacle for agitating the cooling liquid and causing it tobe rapidly circulated around the receptacle.

The space 0', Fig. 2, surrounds the receptacle 0 except at its top, andcontains the freezing compound. The thin walls separat: ing the space 0and the cooling-chambers B permit the freezingcompound to readily 0001articles of food and drink.

Instead of .the doors B, sliding drawers may be used in which to put thearticles to be cooled, as at B Fig. 2.

After each operation of the machine the freezing compound used must beevaporated to restore the salts. This necessitates the removing of thecompound from the chamber 0. To avoid this inconvenience as far aspossible, the case A is provided with a lower receiving-receptacle Ainto which the compound may be discharged by means of the outlet E andthe stop-cock E, and stored until a sufficient quantity is accumulatedto be evaporated, when it is removed through the opening E by thestop-cock E into a retort. The storing of this compound also has acooling effect on the chambers B.

Instead of the slot D in the agitator D a link D Fig. 6, may be employedto connect with the crank D at D".

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is l 1. In an ice-freezing machine,the combination, with a casing having an opening in its top, of a vesselsupported therein at a distance from the casing forming a space for thereception of a freezing-liquid, a lever suspended at its upper end nearthe top and within the casing and extending downwardly below the bottomof the vessel, a blade extending laterally therefrom between the bottomof the vessel and the casing, and means for operating the lever andblade, substantially as described.

2. In an ice-freezing machine, the combination, with a casing having anopening and an inwardly-proj ectin g ledge or rim at its top, of avessel suspended within the casing by means of the ledge forming a spacefor the reception of a freezing-liquid, a cover over the top of thevessel and upon the casing, a lever suspended upon the inner side of thecasing below the ledge and extending down ward between the vessel andthecasing and having an inclined slotted blade projecting laterally fromits lower end between the bottom of the vessel, and means forreciprocating the lever and blade, substantially as described.

3. In an ice-freezing machine, the combination, with a double-walledcasing forming a dead-air space or chamber at its side and having anopening at its top, of a vessel suspended within and-closing the openingand forming a space for the reception of a freezing-liquid, a cover, aslotted lever pivotally secured at its upper end to the inner side ofthe casing near the top, a blade at its lower end projecting laterallybetween the bottom of the vessel and the casing, and a shaft j our naledin the walls of the casing, the inner end of which is provided with acrank which works within the slot and operates the lever, and its outerend is provided with a crank for operating the shaft, substantially asdescribed.

In testimony that I claim the foregoing as my invention I have signed myname, in presof two witnesses, this 25th day of April, 1890.

CHAS. 0. SMITH.

Witnesses:

E. T. THOMAS, JOHN J ENKINs, J 1-.v

